<tr>
  <th scope="col"><%= sort_link @search, :title, Spree.t(:title) %></th>
  <th scope="col"><%= Spree.t(:category) %></th>
  <th scope="col"><%= Spree.t(:author) %></th>
  <th scope="col"><%= sort_link @search, :published_at, Spree.t(:published_at) %></th>
  <th scope="col"></th>
</tr>